McKINNEY, TEXAS —Service First Mortgage, a full-service mortgage lending company, has leased 25,000 square feet of office space in McKinney Corporate Center I, a Class A office building located at 6800 Weiskopf Ave. in McKinney. The deal will relocate the company’s corporate headquarters from Richardson. Cushman & Wakefield’s Craig Wilson, Dan Harris and Randy Cooper arranged the lease. Located within the 2,200-acre Craig Ranch community between the Dallas North Tollway and U.S. Highway 75, the office complex provides access to the cities of Plano, Allen and Frisco. Craig Ranch is also within a 30-minute drive of DFW International Airport and Dallas Love Field.